带有点缺陷的二维颗粒系统离散元模拟  

The DEM simulation for two-dimension granular system with point defects

作　　者：宜晨虹[1] 慕青松[2] 苗天德[2] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,绵阳621900 [2]兰州大学土木工程与力学学院力学系,兰州730000

出　　处：《物理学报》2008年第6期3636-3640,共5页Acta Physica Sinica

基　　金：国家自然基金(批准号:10172041);国家青年科学基金(批准号:10402012)资助的课题~~

摘　　要：首先用离散元方法研究了颗粒系统在各向同性挤压和纯剪切状态下粒子间力的分布情况,并与相同条件下的实验结果进行对比.然后模拟了带有不同数目点缺陷的二维颗粒系统在各向同性挤压和纯剪切时粒子间力的分布情况,并与无缺陷的情况做了比较,发现了点缺陷对颗粒系统的影响规律.In this article, the discrete element method is used to research the force distribution of two-dimensional granular system under the condition of isotropic compression and pure shear. The simulation results are compared with the experimental results under the same conditions. Then we simulate the force distribution of two-dimensional granular system with point defects under the condition of isotropic compression and pure shear and compare the results with the results without point defects. The affects of point defects to granular system are found.

关 键 词：颗粒系统 离散元 点缺陷 力概率分布 

分 类 号：O483[理学—固体物理]